A new set of rules imposed on players has ruffled feathers in the squad. According to German daily Bild, some stars have been accused of coming back from the winter break overweight, as well as being restricted in the topics they can discuss with the media (h/t Calciomercato.com).

Bundesliga expert Clark Whitney provided further insight from the report and detailed that Franck Ribery and Arturo Vidal were the alleged culprits of not sticking closely enough to their diets in recent weeks:

Bild: Pep called Ribery & Vidal fat. No surprises there - two players known for their indulgence in vices!

Along with being prevented from talking to the press about "transfers or future plans," Guardiola has also implemented a ban on his players travelling abroad on days off "unless it is strictly necessary."

It's already been confirmed the Bayern boss will leave Bavaria at the end of his contract this summer, and the Independent's Mark Critchley recently reported he's "likely" to join one of City, United or Chelsea.

Michael Sohn/Associated Press

Guardiola is known to be leaving Bayern at the end of this season.

A member of the squad also anonymously told German newspaper Kicker the mood in the dressing room "is not good," with the number of injuries also said to be hurting the atmosphere (h/t Marca).

Although Bayern returned to Bundesliga action last Friday with a 2-1 win over Hamburg, it's said that sluggish display was indicative of the disgruntled aura that's allegedly overcome Bayern's playing staff.

Der FCB remain eight points in front at the summit of the German top flight, but the loss of star centre-back Jerome Boateng, who could miss three months, said Ross Dunbar of DW Sports, is also sore news.

Whitney also contrasted the differences in morale during the end of Guardiola's Bayern Munich reign and that of predecessor Jupp Heynckes, who retired from management in 2013, as opposed to joining another club: